Adjustable stool



Jan. 25, 1927. 1,615,278

- R. H. IRVINE ADJUSTABLE STGOL Filed Nov. 15, 1924 '2 Sheets-Sheet 1 V .INVENTIOR.

A TTORNEY,

Jan. 25, 1927. 1,615,278

R. H. IRVINE ADJUSTABLE STOOL Filed Nov. 15, 1924 2 Sheets-Sheet 2 v INVENTOR.

Foil/1 h y/ne- ATTORNEY.

" reference numerals Patented Jan. 25, 1927.

UNITED STATES R BIN zl m illm 19. BAY fill-Y, MIQ F I A nnJUsTABnE STOOL.

Application filed November 15, .1924. SeriaIrNO. 750,089.

This invention relates to adjustable stools and the like.

One object of the invention is to design a very simple, substantial, and comfortable stool which can be easily and quickly adjusted as to height, vand which is positively and auton'iaticalkly looked in adjusted position.

Another object of the invention is to provide a full revolving stool which can be adjusted to suit persons of various sizes, and to suit the users needs when performing certain tasks, such as allowing pans or the like to be held on the occupants lap without cramping the legs etc.

A further object is to provide a neat and convenient stool, of a few parts which can be very economically manufactured and assembled.

The above and other objects will appear as the specification progresses, reference being had to the accompanying drawings in which I have shown the preferred embodiment of my invention, and in which like indicate like parts throughout the several views thereof.

In the drawings.

Fig. 1 is a side view} of my improved chair, the back rest being shown in two different positions. 1

Fig. 2 is a top plan sectional view taken on the line 2-201 Fig. 1.

Fig. 3 is a plan view ofone of the block members showing the locking ring in proper position.

Fig. 4 is an enlarged plan of the locking key 01' ring.

Fig. 5 is an enlarged side view of the seat post.

Fig. 6 is a. vertical sectional view thereof.

Fig. 7 is a fragmentary top plan view of the seat, the releasing mechanism being shown in two different positions.

Fig. 8 is asection taken on the line 88 of Fig. 6.

Referring now particularly to the drawings. The numeral 1 indicates the legs of the stool which I prefer to form of angle iron and which are secured to the spaced apart block members 2 by means of the threaded studs 3 cast integral therewith.

The lower ends of the legs are bent out wardly as shown, a conventional castor 4 being secured to each respective leg, and a circular foot rest being of a diameter sufficient to allow the occupants legs ,to be straight when sitting; this allows a pan or article to ,be held in the lap without danger of spilling or slippage, and does not cramp the occupants legs as is customary with the conventional stool. A centrally disposedopening 6 is provided in itheblocks 2 anda cylindrical post member 7 is mounted therein; this post member is formed of a .seotionioi-f hollow tubing having a vertically disposed ikeyway v8 formed therein, and a plurality of notchesf) xQn either side thereof. A rod member 10 s mounted in this post member 7, one end being ,bent at right angles and extending through an opening in the tube, and on which a coiled spring 11 s mounted, said spring "being interposed between the post and a pin 10? set in the end of therod 1.0, the opposite end i bent -of which are bent over as shown in F igure 3, the lower ends being bent in a similar manner and are securedto the ;underside of he lo by m ans. o olts (not sufii ient play e ng p ded to a lo f r limited horizontal movement of the ring for a purpose to be presently described. The member 12 is formed with centrally disposed tongue 13 connected to the main body by mean o a su a le 4., and is proid d wi h cent a y i pose pe ng 15 through which the rod 10 extends, the front end of this ring having reduced flatted portions 16 adapted to fit and seat in the notches 9, the lug 17 being of the same thickness as the ring proper.

It will be, noted that the rod 10 is not in the center of the post, and that the inside diameter of the ring 12 is considerably larger than the post, but suiiicient resilience is provided by the coiled spring and the resiliency of the rod 10, to allow the ring to be centered on the post, and inasmuch as the ring is of a larger diameter it can be adjusted vertically thereon, the action of the spring and resiliency of the rod tending however, to force the ring into the notches in the tube at all times.

A conventional seat 18 is mounted on this post 7 in the usual manner, and angles 19 are secured to the underside thereof, a rod 20 being pivotally secured to these angles by means of bolts 21 this rod being one continuous piece on which a curved back rest 22 is adjustably mounted by means of clips 23 or the like.

A brace rod 24 is also pivotally secured to the angle 19 by means of a bolt 25, the upper end being pivota-lly secured to a clip 26 frictionally secured to the member 20, adjustment being secured by moving the clip on this rod.

To facilitate the vertical adjustment of the stool, I have provided a lever 27 pivotally secured to the underside of the seat by means of a bolt 28. A flat bar 29 is rigidly secured to this lever and engages the end of the rod 10, a flexible cord or member 30 leading to and connecting the bar 27 with a hand lever 31 which is pivotally secured to the underside of the seat at the point 32, and when desiring to raise or lower the seat, it is merely necessary to pull the lever 31 to position as shown in dotted lines, forcing the locking ring or key 12 out of engagement with the notches 9, and the-post can be raised or lowered as desired.

This construction provides an absolutely positive locking feature which cannot slip, and which will not become loose and sloppy by long use.

From the foregoing description it will be obvious that I have perfected a very simple, economical and positive locking adjustable stool for use in the kitchen, ofiice, or in any place where a comfortable adjustable stool is required.

What I claim is 1. An adjustable stool comprisin a base, a tubular post revolubly and adjustably mounted therein and provided with a vertically disposed slot provided with spaced apart oifset slots, a locking member mounted on the base, a rod mounted in'the post and engaging said locking member and adapted to be actuated to bring said locking member into engagement with the ofiset slots for holding said post in adjusted position.

2. An adjustable stool comprising a base, a tubular post adjustably mounted therein, a ring surrounding said post and having a centrally disposed tongue extending thereinto, an opening in the tongue, and a rod mounted in said post and extending through said tongue.

3. An adjustable stool comprising a base, a hollow tubular post adjustably mounted therein and provided with a vertically disposed slotted opening, a locking key mounted on the base and surrounding said post and having a centrally disposed tongue formed integral therewith, said tongue extending through the slotted opening, an opening in the tongue, a vertically disposed rod resiliently mounted in said post and extending through said tongue, and adapted when actuated to force said key into engagement with the slotted opening in the post.

4. An adjustable stool comprising a base, a hollow tubular post adjustably mounted therein and provided with a Vertically disposed slotted keyway, a rod secured in said post, a locking ring mounted on the base and surrounding said post, said ring being formed with a tongue adapted to extend through said slot and be mounted on said rod for resiliently forcing the ring into engagement with the slots in the keyway.

5. An adjustable stool comprising a base, a tubular post mounted thereon and having a vertically disposed slotted keyway, a looking member mounted on the base and surrounding said post, said locking member bein g formed with a tongue having a centrally disposed opening therein, a rod in the post and extending through said opening, and resilient means on the rod for resiliently forcing said locking member into engagement with the slotted keyway.

In testimony whereof I aflix my signature.

ROBIN H. IRVINE. 

